AMT303A-0500-4000 [CUI]
COMMUTATION ENCODER; 换向编码器
| 型号： | AMT303A-0500-4000 |
| 厂家： | 
CUI INC |
| 描述： | COMMUTATION ENCODER |
| 文件： | 总7页 (文件大小：386K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
date 11/2010
page 1 of 7
PART NUMBER: AMT303
DESCRIPTION: COMMUTATION ENCODER
The AMT 303 is a commutation
encoder with additional incremental
channels A, B, and Z. The encoder
output utilizes standard U,V,W
commutation signals with additional
quadrature A,B and Index signals
provided for speed control or
positioning operations. A SPI serial
bus allows for commutation settings
to be easily adjusted via a demo
board, or preconfigured and stored
for large production assembly for
various motor configurations.
FEATURES
- U,V,W Commutation lines
- Small Size 37mm
- Line count up to 1024
- Optional Line Driver output
- Single pulse index
- Capacitive ASIC technology
- Modular locking hub design for
ease of installation
- 2,4,6,8,10,12, or 20 pole motors
- SPI adjustable settings
- ‘One Touch’ commutation signal
alignment
ELECTRICAL SPECIFICATIONS
parameter
conditions/description
min
nom
5
max
5.5
10
units
V
power supply
4.5
current consumption
commutation output signals
commutation pole
8
mA
U, V, W phase
2, 4, 6, 8, 10, 12, 20 (software programmable)
A, B, Z phase (A, B, Z available on AMT303LD)
square wave
incremental output signals
incremental output waveform
incremental output resolutions
Index
96, 192, 200, 250, 400, 500, 512, 1024
one pulse per 360 deg
96
512
1,024
0.55
ppr
incremental output current
output voltage - sourcing to +5 V @ -32 mA
output voltage - sinking to ground @ -32 mA
3.8
V
V
MECHANICAL SPECIFICATIONS
parameter
conditions/description
min
nom
max
360
units
deg
output range
mounting hole options
A) 2 each M1.6 on 16 mm (0.63”) bolt circle
B) 2 each #4 on 19.05 mm (0.75”) bolt circle
C) 2 each M1.6 or M2 on 20 mm (0.787”) bolt circle
D) 3 each M1.6 or M2 on 20.9 mm (0.823”) bolt
circle with washers in option B holes
E) 3 each M1.6 or M2 on 22 mm (0.866”) bolt circle
F) 4 each M1.6 or M2 on 25.4 mm (1”) bolt circle
ENVIRONMENTAL SPECIFICATIONS
parameter
conditions/description
min
-40
nom
max
125
85
units
°C
operating temperature
humidity
%RH
Hz
vibration
1.5mm, 3 directions, 2 hours
10
55
20050 SW 112th Ave. Tualatin, Oregon 97062
phone 503.612.2300 fax 503.612.2380 www.cui.com
date 11/2010
page 2 of 7
PART NUMBER: AMT303
DESCRIPTION: COMMUTATION ENCODER
AMT303-V KIT
In order to provide maximum flexibility for our customers, the AMT303 series is provided in kit form standard. This allows the user to
implement the encoder into a range of applications using one sku#, reducing engineering and inventory costs.
SLEEVES
1/4 inch
3/16 inch
(4.76mm)
Yellow1
1/8 inch
8mm
6mm
5mm
4mm
3mm
2mm
(6.35mm)
(3.175mm)
Blue
Snow
Red1
Green1
Gray60
Purple1
Orange
Light Sky Blue
TOOL A
SHAFT
ADAPTER
TOOL C
BASE
TOP COVER
CUSTOM CONFIG KEY
For customers that prefer a specific AMT303 configuration, please reference the custom configuration key below.
AMT303 X - XXXX - XXXX
Output Signals:
“blank” = A, B, Z
LD = Line Driver
A, B, Z
Resolution (ppr):
0096
0192
0200
0250
Sleeve Bore Diameter:
2000 = 2 mm
3000 = 3 mm
3175 = 3.175 mm (1/8”)
4000 = 4 mm
A, B, Z
0400
0500
4760 = 4.76 mm (3/16”)
5000 = 5 mm
0512
6000 = 6 mm
0640
1024
6350 = 6.35 mm (1/4”)
8000 = 8 mm
20050 SW 112th Ave. Tualatin, Oregon 97062
phone 503.612.2300 fax 503.612.2380 www.cui.com
date 11/2010
page 3 of 7
PART NUMBER: AMT303
DESCRIPTION: COMMUTATION ENCODER
ENCODER INTERFACE
PINOUT CONNECTOR 1
FUNCTION
#
14
13
12
11
10
9
AMT303
AMT303LD
GND_C
GND_C
N/A
X
N/A
A
-X
X
-A
A
-B
N/A
B
B
8
B
7
V
V
5 V+
W
5 V+
W
6
5
GND
U
GND
U
4
3
2
1
zero set
N/A
zero set
N/A
13 11
9
7
8
5
6
3
4
1
2
14 12 10
DETAIL B
SCALE 4 : 1
Demo Board Side
Encoder Side
1' 0.25"
305
28 AWG
10 conductor
1.27 mm pitch
Demo Board Cable
Samtec
ISDF-07-D
(Cable available without Demo Board Connector)
20050 SW 112th Ave. Tualatin, Oregon 97062
phone 503.612.2300 fax 503.612.2380 www.cui.com
date 11/2010
page 4 of 7
PART NUMBER: AMT303
DESCRIPTION: COMMUTATION ENCODER
10.34 0.407
R15.49 0.610
15.30 0.602
15.33 0.604
37.39 1.472
28.58 1.125
10.93 0.430
A (3 PLCS)
22.00 0.866
2.00 0.079
(4 PLCS)
21.45 0.844
12.60 0.496
TOLERANCE:
19.05 0.750
20.90 0.823
2.95 0.116
R2.10 0.083
0.05mm UNLESS OTHERWISE
(2 PLCS)
SPECIFIED
1.70 0.067
(2 PLCS)
0.55
DETAIL A
SCALE 4 : 1
RoHS
25.48 1.003
16.00 0.630
18.60mm
AMT303 COM
US Patent No. 6892590
SCALE 5:1
R1.20mm
20050 SW 112th Ave. Tualatin, Oregon 97062
phone 503.612.2300 fax 503.612.2380 www.cui.com
date 11/2010
page 5 of 7
PART NUMBER: AMT303
DESCRIPTION: COMMUTATION ENCODER
APPLICATION NOTES
Encoder operational mode
• Initialization mode: At power up the encoder goes through an initiation and stabilization procedure.
This includes microprocessor stabilization and the program for combining Coarse
and Fine channel of the encoder for getting the absolute start position. This takes
less than 0.1 seconds.
• Tracking mode:
– MCU 12 bit position register is updated from Fine Asic every 48 μs.
– The commutation program in the MCU has a compensation for the average delay caused by the
update rate, leaving a remaining jitter of less than 24 μs RMS.
•The communication jitter expressed in electrical degrees will be proportional speed and
does not reach 6 deg RMS until the speed reaches the following values:
Pole Count
4
6
8
10
12
20
Speed Limit RPM
17,361
11,574
8,681
6,944
5,787
3,472
Serial Peripheral Interface Commands
The SPI or Serial Peripheral Interface Bus is a standard interface promoted by Motorola and Microchip among
others. It consists of 4 signals:
MOSI: Master Out Slave In
MISO: Master In Slave Out
SCK: Serial Clock
CSB: Chip Select Bar (active low)
SPI BUS
The SPI bus runs full duplex and transfers multiples of 8 bits in a frame. The SPI type is the most common
(CPOL=0, CPHA=0), also known as Microwire. Data is captured on the rising edge of SCK and the output data is
changed after the falling edge of SCK.
Figure 7: SPI BUS Timing Diagram
MISO
SCK
lsb
msb
Terminology
MSB = most significant byte
LSB = least significant byte
msb = most significant bit
lsb = least significant bit
MOSI
CSB
lsb
msb
Setup
Serial Peripheral Interface Bus (SPI) on AMT303
20050 SW 112th Ave. Tualatin, Oregon 97062
phone 503.612.2300 fax 503.612.2380 www.cui.com
date 11/2010
page 6 of 7
PART NUMBER: AMT303
DESCRIPTION: COMMUTATION ENCODER
The msb data out on MISO is valid soon after CSB goes low. The MOSI data is valid soon after the falling edge of
SCK. The Encoder drives data out on MISO as long as CSB is low.
Normally, CSB goes low, then after 8 clocks the command is interpreted. CSB high resets the clock counter, and
terminates any command sequence.
SPI Commands:
The commands are all 8 bits long, the MSB is shifted in first, and is the leftmost bit shown in Figure 7.
Encoder Protocol Considerations:
The Encoder is designed to operate with a high speed SPI link, in full duplex mode. This implies the host can is-
sue commands and read data as quickly as necessary but there has to be an acknowledgement from the slave just
before the data is transferred.
Essentially the host issues a command, receives zero or more wait sequences (0xA5 or 1010,0101) then the echo
of the command followed by an optional payload.
So, for example to read the position, the host issues rd_comm, receiving a series of wait sequences (0xA5) then a
reflected rd_comm, then the MSB data followed by the LSB data.
It is recommended that the host leave a 20 μs gap between reads to avoid extending the read time by forcing wait
sequences.
Command 0x00: nop_a5
This command is ignored by the Encoder and simply causes the next data to be read. The encoder responds with
0xA5 if there is nothing else to send.
Note that it is possible to overlap commands, so instead of NOP is several steps above the user could start another
operation. The read and write FIFOs for the PCI streams are 16 bytes long and it is up to the user to avoid overflow.
Command 0x51: rd_comm
This command causes the commutation values and EIDXN value to be read and put in the output fifo.
The reply is 2 bytes, the first byte is reserved (eg. A lookup value between 0 and 31 but subject to change), the
second byte has EIDXN,U,V,W in the low 4 bits.
20050 SW 112th Ave. Tualatin, Oregon 97062
phone 503.612.2300 fax 503.612.2380 www.cui.com
date 11/2010
page 7 of 7
PART NUMBER: AMT303
DESCRIPTION: COMMUTATION ENCODER
Command 0x70: set_zero_point
This command sets the current position to zero or adjusts to the offset stored in comm_pos in the EEPROM and
saves this setting in the EEPROM. The host should send nop_a5 repeatedly after sending this command, the
response will be 0xa5 while update is proceeding and eeprom_wr is the response when update is finished. 0xF9 is
the location for the Low Byte of comm_pos and 0xF8 is the location for the High Byte of comm_pos.
Comand 0x80,<byte_address>,<data>: eeprom_wr
This command causes the data to be written to the address given in <byte_address>. The address can be 0x00 to
0x7f for 128 bytes of data.
Comand 0x90,<byte_address>,0x01: eeprom_rd
This command causes the data in eeprom at the given address to be read and put in the output fifo.
The sequence is as follows:
1) issue read command, receive idle character
2) issue NOP, receive idle character or 0x90 (echo of read command)
3) repeat step 2 if it is an idle character
4) issue NOP and receive
Commutation Alignment and setting the Zero point
To align the commutation angle with the encoder there are two steps:
1) Configure the encoder alignment angle using the Demo Board. The alignment angle is the angle relative to
U,V,W poles which is used for setting the encoder on the armature. The alignment angle is set at the same time
as several other parameters, and the encoder must be power cycled after configuration.
2) With the encoder mounted, position the rotor to the alignment angle and use the “zero” command on the demo
board to write the rotor position in non-volatile memory in the encoder. The encoder must be power cycled after
this operation, and it will use this offset at initialization every time at startup.
Note: the demo board allows setting the alignment angle between -180 and 180 degrees in increments of
5 degrees. 0 (zero) degrees corresponds to the rising edge of the U signal. The direction of rotation can also
be set.
20050 SW 112th Ave. Tualatin, Oregon 97062
phone 503.612.2300 fax 503.612.2380 www.cui.com
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